Hi and welcome to the board. Based on your post I found the quilt by Mary Quilting here:
american eagle
She references VMQuilts so I found her post:
american eagle
I then found Delta's post.
Eagle Wall Quilt 2013
Based on the description given in the two posts and going back to the original by VMQuilts, it sounds like this is an original pattern based on a leather working pattern. I think VMquilts and Mary quilting drafted the applique design themselves. It appears Mary quilting then sold her pattern to Delta.
VM and Delta have not been active on the board for years so a response to a PM might not be likely. Mary quilting last posted in March of this year. Your best bet is to either find the original leather work pattern or print out a picture of one of the quilts and enlarge it and make your own pattern.
Edited to add, apparently Mary quilting found it as a free clip art and she made the pattern from that.
http://clipart-library.com/clipart/6ir9gd4iK.htm
Here is another
https://www.dreamstime.com/royalty-f...-image14672717